Maryland Insurance Section 15-819
§ 15-819.
  (a)   This section applies to:
    (1)   each individual, group, or blanket health insurance policy that is issued or delivered in the State by an insurer; and
    (2)   each contract or certificate that is issued or delivered in the State by a nonprofit health service plan.
  (b)   A policy, contract, or certificate subject to this section that provides coverage for an inpatient service in an acute general hospital shall provide coverage for:
    (1)   a corresponding outpatient service that is provided to the insured instead of the inpatient service because of the denial, after review under a utilization review program, of a request by the attending physician for an inpatient admission; and
    (2)   an objective second opinion given to the insured when required by a utilization review program under § 19-319 of the Health - General Article.